Quillio vs Casetext
Casetext built the original CoCounsel and was acquired by Thomson Reuters in 2023. Its core research platform is US-focused — covering US case law and legislation with a modern, accessible interface. It is not an AU/NZ product. Quillio is purpose-built for AU/NZ legal practice with weekly local training, AU data sovereignty, and AU PMS integrations.
Casetext is a US legal research platform (now part of Thomson Reuters, and the origin of CoCounsel). Quillio is purpose-built for AU/NZ lawyers — weekly local training, AU data sovereignty, and AU PMS integrations.
Platform Overview
Purpose-Built for AU/NZ Quillio is an AI legal assistant purpose-built for Australian and New Zealand lawyers. It is trained weekly on AU/NZ legislation, case law, and regulatory updates across all states, territories, and federal jurisdictions. Every research output includes source citations linking back to verifiable AU/NZ legal authorities. Quillio holds SOC 2 Type II and ISO 27001 certifications with full Australian data sovereignty.
Casetext is a US legal research platform founded in 2013 that built its reputation on accessible case law research and became the origin of CoCounsel, one of the early generative AI legal assistants. Casetext was acquired by Thomson Reuters in 2023 for US$650m. Its research content and tooling are US-focused — US federal and state case law, statutes, and regulations.
Feature-by-Feature Comparison
A fact-based look at how the two platforms differ across 16 features that matter most to Australian legal practitioners.
| Feature |
Quillio
| Casetext |
|---|---|---|
| Australian case law coverage | Quillio leads Comprehensive — updated weekly across all jurisdictions | US-focused — AU case law not the content library |
| NZ law coverage | Quillio leads Full coverage — NZ legislation, case law and regulations | No NZ-specific training |
| US case law and statutes | Not the product focus | Casetext leads Core strength — US federal and state law |
| Source citations on every output | Equal Yes — citations on every research result | Yes — citations on US research outputs |
| Hallucination safeguards | Equal Grounded in verified AU/NZ legal sources | Grounded retrieval on US legal sources |
| AI document review | Equal Contracts, briefs, legislation, affidavits, leases | Available within the TR / CoCounsel ecosystem |
| AI chronology creation | Equal Automated chronologies from uploaded documents | Chronology tools within TR products |
| AI drafting (jurisdiction-appropriate) | Quillio leads AU/NZ-oriented drafting | US-oriented drafting |
| Voice-to-text dictation | Quillio leads Yes — dictation converted to structured notes | Not a core feature |
| Data sovereignty | Quillio leads Australian-hosted — data never leaves AU soil | TR global infrastructure — AU residency depends on contract |
| AU practice management integrations | Quillio leads Multiple AU PMS integrations — see integrations page | Integrations via TR ecosystem |
| Pricing transparency | Quillio leads Per-user pricing published on website | Enterprise sales model via TR |
| Free trial | Quillio leads Full product free trial, no credit card | Demo via sales team |
| Audit trail of legal queries | Equal Yes — every query and output logged for compliance | Enterprise admin logging via TR |
| Target market | AU/NZ legal practitioners | US lawyers, now inside Thomson Reuters |
| Security certifications | Equal SOC 2 Type II + ISO 27001 | SOC 2 / ISO 27001 via TR |
Australian Law Coverage
Casetext's content library and training are US-focused. That is the product's market, and on US research it is well-regarded. For AU/NZ practice, the jurisdictional fit is weaker and the integration / data-residency advantages of an AU-built product do not apply. Quillio is trained weekly on AU/NZ case law, legislation, and regulation.
Data Sovereignty
Casetext runs on Thomson Reuters global infrastructure. AU data residency is typically a contract-specific arrangement. Quillio is AU-hosted by default.
Practice Management Integrations
Casetext integrates inside the Thomson Reuters ecosystem. Quillio integrates with AU practice management systems AU firms use day-to-day. Visit our integrations page for the full list.
View all integrationsKey Differences That Matter
Where Quillio Leads
- Quillio is trained weekly on AU/NZ case law, legislation, and regulation — not a US product with AU content added later.
- Full Australian data sovereignty — client documents and queries processed and stored on AU soil.
- Citations grounded in AU/NZ authorities that AU lawyers can verify directly.
- Purpose-built AU PMS integrations so AI-assisted work fits inside the firm's existing matter workflow.
- Published per-user pricing and a free trial with no credit card.
Where Casetext Has Strengths
- Casetext built the original CoCounsel and has been one of the most influential products in the generative legal AI category — the acquisition by Thomson Reuters at US$650m reflects that.
- The US case law research platform is well-designed, with a modern interface and citations that are widely respected by US practitioners.
- Grounded retrieval on US legal sources, which materially reduces hallucination risk on US research questions.
- Integration with the Thomson Reuters ecosystem (Westlaw, Practical Law, CoCounsel) gives US firms a coherent stack.
- Strong reputation in the US legal market with a long history before the TR acquisition.
Which Platform for Your Practice?
Real scenarios showing which platform suits different types of Australian legal practice.
You have read about Casetext and CoCounsel online and are wondering if either is the right tool for your AU practice.
Quillio. Casetext is US-focused and CoCounsel sits inside the Thomson Reuters US stack. For AU practice, an AU-built product is a materially better fit.
Your team handles AU matters with a genuine US component.
Quillio as the AU anchor. For US-specific research, Casetext or Westlaw (both TR) can sit alongside depending on budget and frequency of US work.
The US parent uses CoCounsel. You are considering it for the AU team.
Quillio for the AU team. CoCounsel is strong for US work but is not purpose-built for AU/NZ. Running Quillio alongside the US team's CoCounsel is a common arrangement.
Who Should Choose Casetext
US lawyers — particularly at firms already on Thomson Reuters infrastructure — will find Casetext a credible research platform, and CoCounsel (now part of TR) a credible generative AI product for US legal work. For AU/NZ firms, the jurisdictional fit is weaker and an AU-built product is usually a better anchor.
Who Should Choose Quillio
AU/NZ firms and in-house teams that want an AI assistant built for their jurisdiction — with weekly AU/NZ training, AU data sovereignty, AU PMS integrations, and local support — should start with Quillio.
Built for Australian law, from day one
The best way to see the difference is to try it yourself for free. Start your free trial — upload your first document and test it on your own matters. No credit card required.
Start Free TrialFrequently Asked Questions
Does Casetext cover Australian law?
Casetext's content library is US-focused. It is not positioned as an AU/NZ research product. Quillio is trained weekly on AU/NZ case law, legislation, and regulation.
What is the relationship between Casetext and CoCounsel?
Casetext built the original CoCounsel product. Thomson Reuters acquired Casetext in 2023, and CoCounsel now sits inside the TR product family alongside Westlaw and Practical Law.
Is Casetext hosted in Australia?
Casetext now runs on Thomson Reuters global infrastructure. AU data residency depends on contract terms. Quillio is Australian-hosted by default.
How does pricing compare?
Thomson Reuters uses an enterprise sales model for Casetext / CoCounsel and does not publish pricing publicly. Quillio publishes per-user pricing on the website and offers a free trial with no credit card.
Can I use Casetext and Quillio together?
Yes, particularly for firms with US cross-border work — Casetext / CoCounsel for US research, Quillio for AU/NZ work.
Which is better for a sole practitioner in AU?
Quillio. Casetext is US-focused and is sold through Thomson Reuters enterprise channels. For AU sole practitioners, an AU-built product with published pricing and a free trial is the right fit.
Can I try Quillio before committing?
Yes. Quillio offers a free trial with no credit card required. You can upload your own documents, run AU/NZ research queries, and test all features on your real matters before making any commitment.